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Page 4 of 6 I Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#4932 16 E Harding Way Stockton CA Well" 4; Depth Groundwater LPH Groundwater Ethyl-__ Xylenes MtBE MtBE"Well W W Date" x, Elevation to Water 'Elevation Thickness Elevation TPHg Benzene Toluene benzene (total) 8020 (802018260) - _t al DO Number f Sampledjs ' (ft MSL)' ft TOO)__ ft MSL ftChan ft) -(ppb) (ppb) (ppb) (ppb (ppb) (ppb) (mg&) MW-11 07/12/02 P 1105 2903 -1798 000 — <50 <0 50 14 <0 50 081 <2 5 <0 50 30 11/20/02 P 3173 -2068 000 -270 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 053 01/30/03 P 3090 1985 000 083 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 1 73 04/28/03 P 3014 -1909 000 076 <50 <0 50 <0 50 <0 50 <0 50 -- <0 50 1 32 07/29!03' P 3168 -2063 000 -154 <50 5 <0 50 <0 50 <0 50 <0 50 — <0 50 — 10108-09103 P 3330 -2225 000 -162 <50 ' <0 50 078 <0 50 087 — <0 50 071 01/12104 P 32 64 -2159 000 066 <50 <0 5o <0 50 <0 50 <0 50 — <0 50 070 SVE-1 09/05/00 P 1184 2645 -1447 000 — 66 600 1 770 8 000 2 550 12 900 1 140` — — 11/02/00 P 2711 -1513 000 -066 4 750 152 469 164 823 212 21211 200 28 03/05/01 P 2640 -1456 000 057 72 300 2090 10 100 2,710 14 800 12 100 12100/3720 51 05/08/01 P 2604 -1420 000 036 45 300 1 560 5170 1 850 9 490 6 900 6 90014 930 031 07120101 P 2749 -1564 ' 001 -144 Not sampled 0 01 ft LPH present 10/22/01 P 2893 -1708 ' 001 -144 Not sampled 0 01 ft LPH present 01/15/02 — — -- -- Not sampled well dry 04/11/02 NP 2788 -1604 000 104 87,000 5,200 16,000 3 900 20 000 20 000 19 000 30 07/12/02 NP 2898 -1714 000 -1 10 85 000 4 100 8 900 3,700 18,000 13 000 15 000 22 11/20/02 — — — — Not sampled well dry 01/30103 — — — — — Well unable to be sampled connected to remedial system 04/28/03 — — — — — Well unable to be sampled connected to remedial system 07/28103 2974 -1790 000 — Insufficient amount or water in well for sample collection 10117/03 — — — -- — Not sampled well dry 01112104 — — — — -- Not sampled well dry DMW-1 04/11/02 P 1198 2810 -1612 000 — <500 96 <5 0 <5 0 <5 0 230 140 -- 07/12102 P 2925 -1727 000 -1 15 55 <0 50 <0 50 <0 50 <0 50 72 64 27 11/20/02 P 3164 -1966 000 -239 <50 076 063 <0 50 1 5 18 21 �0 16 01/30/03 -- -- — — — Well unable to be sampled located in construction area 04/28/03 P 3020 -1822 000 — <50 <0 50 <0 50 <0 50 <0 50 -- 13 274 07128103' P 3164 -1966 000 -144 50 5 <0 50 <0 50 <0 50 <0 50 -- 52 -- 10/08/03 P 3323 -2125 000 -159 <50 <0 50 063 <0 50 081 -- 33 035 01/12/04 P 3271 -2073 000 052 <50 <0 50 <0 50 <0 50 <0 50 — 25 DMW-2 07/12102 P 11 10 2836 -1726 000 — <50 10 16 062 20 130 85 28 11/20/02 P 3084 -1974 000 -248 <50 <0 50 <0 50 <0 50 12 41 64 327 01!30103 P 3004 -1894 000 080 <50 <0 50 <0 50 <0 50 <0 50 40 33 521 04/28/03 P 2933 -1823 000 071 <50 <0 50 <0 50 <0 50 <0 50 — 076 1 75 07128103' P 3088 -1978 000 -155 <50 5 <0 50 <0 50 <0 50 061 -- <0 50 — 10108/03 P 3241 -2131 000 -153 <50 <0 50 091 <0 50 1 1 -- 14 204 01112/04 P 3188 -2078 000 053 53 96 24 08 31 — 13 I Protect/ARCO/4932/Reports/Tablesl1O04 gwtables4932